A Novel Approach for Channel Estimation for MIMO-OFDM Systems Using PDP Technique
Journal Title: International Journal of Research in Computer and Communication Technology - Year 2013, Vol 2, Issue 8
Abstract
Multiple Input – Multiple Output Orthogonal frequency Division Multiplexing (MIMO-OFDM) is considered as eminent technology in the world of wireless communication such as 3rd Generation technology as well as WiMAX. The successful implementation of LMMSE channel estimator in MIMO-OFDM is based on the reduction in the distortions caused by various factors such as by null subcarriers and the residual noise caused by the insufficient number of samples for power delay profile (PDP) estimation. Hence, we proposed a PDP estimation technique for linear minimum mean square error (LMMSE) channel estimator in MIMO-OFDM system. The proposed technique effectively mitigates the distortions for accurate PDP estimation and the distortion caused by null subcarriers. In addition, this technique also reduces the correlation mismatch in the frequency domain. The output of LMMSE channel by using the proposed PDP estimate approaches that of Wiener filtering and Kalman Filtering as results of the mitigation of distortion effects.
Authors and Affiliations
Md Tajuddin, A Mallikarjuna Prasad
Keywords
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